Close proximity air carrier medium large transport and same direction commuter mdt inbound to clt.

Attributes
ACN	199604
Time
Date	199201
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : clt
State Reference	NC
Altitude	msl bound lower : 10000 msl bound upper : 10300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : clt tower : hou
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other descent other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Transport, Low Wing, 2 Turboprop Eng
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : flight engineer pilot : commercial pilot : cfi pilot : atp
Experience	flight time last 90 days : 150 flight time total : 10000
ASRS Report	199604
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : atp
Experience	flight time last 90 days : 150 flight time total : 5000 flight time type : 2000
ASRS Report	199603
Events
Anomaly	conflict : nmac non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 660 vertical : 100
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

While on descent into clt and at 11000 ft we were issued a clearance of 'descend and maintain 10000 ft and keep your speed up.' we read back the clearance and started our descent. At 10300 ft we picked up a visual on back end of an mdt at 10100 ft. Approach told us to maintain 11000 ft and our TCASII started to tell us to descend. We responded to approach that we were already at 10000 ft and that we had the traffic in sight. At that point the controller instructed us to maintain 10000 ft and maintain visual separation with the mdt. No quick maneuvering was required only a slight correction to the right in order to increase separation to a more comfortable distance.

Original NASA ASRS Text

Title: CLOSE PROX ACR MLG AND SAME DIRECTION COMMUTER MDT INBOUND TO CLT.

Narrative: WHILE ON DSCNT INTO CLT AND AT 11000 FT WE WERE ISSUED A CLRNC OF 'DSND AND MAINTAIN 10000 FT AND KEEP YOUR SPD UP.' WE READ BACK THE CLRNC AND STARTED OUR DSCNT. AT 10300 FT WE PICKED UP A VISUAL ON BACK END OF AN MDT AT 10100 FT. APCH TOLD US TO MAINTAIN 11000 FT AND OUR TCASII STARTED TO TELL US TO DSND. WE RESPONDED TO APCH THAT WE WERE ALREADY AT 10000 FT AND THAT WE HAD THE TFC IN SIGHT. AT THAT POINT THE CTLR INSTRUCTED US TO MAINTAIN 10000 FT AND MAINTAIN VISUAL SEPARATION WITH THE MDT. NO QUICK MANEUVERING WAS REQUIRED ONLY A SLIGHT CORRECTION TO THE R IN ORDER TO INCREASE SEPARATION TO A MORE COMFORTABLE DISTANCE.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.